add all precursors, still waiting for clearity on EDGAR

...logues_comparisons/.ipynb_checkpoints/CO-checkpoint.ipynb

...ogues_comparisons/.ipynb_checkpoints/NH3-checkpoint.ipynb

...ogues_comparisons/.ipynb_checkpoints/NOx-checkpoint.ipynb

...ogues_comparisons/.ipynb_checkpoints/SO2-checkpoint.ipynb

scenario comparison/catalogues_comparisons/CO.ipynb

scenario comparison/catalogues_comparisons/NH3.ipynb

scenario comparison/catalogues_comparisons/NOx.ipynb

scenario comparison/catalogues_comparisons/SO2.ipynb

...rio comparison/catalogues_comparisons/preprocessing.ipynb